diff options
| author | Soby Mathew <soby.mathew@arm.com> | 2018-01-09 14:36:14 +0000 |
|---|---|---|
| committer | Soby Mathew <soby.mathew@arm.com> | 2018-02-26 16:31:10 +0000 |
| commit | a6f340fe58b991882d075eed6916288fe4fa40c5 (patch) | |
| tree | c29b8981449b06019c3695932ba6ef5bb4db1294 /bl32 | |
| parent | 6d31020e90093456efb373cde446b07770d38953 (diff) | |
Introduce the new BL handover interface
This patch introduces a new BL handover interface. It essentially allows
passing 4 arguments between the different BL stages. Effort has been made
so as to be compatible with the previous handover interface. The previous
blx_early_platform_setup() platform API is now deprecated and the new
blx_early_platform_setup2() variant is introduced. The weak compatiblity
implementation for the new API is done in the `plat_bl_common.c` file.
Some of the new arguments in the new API will be reserved for generic
code use when dynamic configuration support is implemented. Otherwise
the other registers are available for platform use.
Change-Id: Ifddfe2ea8e32497fe1beb565cac155ad9d50d404
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
Diffstat (limited to 'bl32')
| -rw-r--r-- | bl32/sp_min/aarch32/entrypoint.S | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/bl32/sp_min/aarch32/entrypoint.S b/bl32/sp_min/aarch32/entrypoint.S index e7528d38..3dd23696 100644 --- a/bl32/sp_min/aarch32/entrypoint.S +++ b/bl32/sp_min/aarch32/entrypoint.S @@ -64,8 +64,10 @@ func sp_min_entrypoint * specific structure * --------------------------------------------------------------- */ - mov r11, r0 - mov r12, r1 + mov r9, r0 + mov r10, r1 + mov r11, r2 + mov r12, r3 /* --------------------------------------------------------------------- * For !RESET_TO_SP_MIN systems, only the primary CPU ever reaches @@ -88,8 +90,6 @@ func sp_min_entrypoint * Relay the previous bootloader's arguments to the platform layer * --------------------------------------------------------------------- */ - mov r0, r11 - mov r1, r12 #else /* --------------------------------------------------------------------- * For RESET_TO_SP_MIN systems which have a programmable reset address, @@ -111,15 +111,22 @@ func sp_min_entrypoint * Zero the arguments passed to the platform layer to reflect that. * --------------------------------------------------------------------- */ - mov r0, #0 - mov r1, #0 + mov r9, #0 + mov r10, #0 + mov r11, #0 + mov r12, #0 + #endif /* RESET_TO_SP_MIN */ #if SP_MIN_WITH_SECURE_FIQ route_fiq_to_sp_min r4 #endif - bl sp_min_early_platform_setup + mov r0, r9 + mov r1, r10 + mov r2, r11 + mov r3, r12 + bl sp_min_early_platform_setup2 bl sp_min_plat_arch_setup /* Jump to the main function */ |